I am a newbie and a little lost. Which classes or tools do you recommend to create an infinite libgdx game world with collision detected available, so that the player can walk on it? The concept is shown in the images below. The camera (phone screen) moves around the world in a non-linear fashion(on a boundary between green and white in this image), tracking the character. All I need is some place to start, I will be good from there on.
EDIT: Basically the problem is to create an infinite world, perhaps self generating is a better world, with collision detection enabled. I have tried nothing because I don't even know where to start. I only need to be directed in the right direction on this.
Just to give you a few keywords to search for:
Infinite world: Procedural generation
libGDX collision detection:
Box2D or bullet (physics engines inside libGDX)
libGDX provides also Circle or Rectangle to check for overlapping
Camera tracking: ViewPort, Culling
Related
I'm making my very first game with libgdx, and it involves making levels with many right angles, very much like a maze. All I know how to make a collision is to make an invisible rectangle on each wall that collides with the player, but with so many walls this is an irrational solution, to make a rectangle for every single wall.
Since all the walls and edges will be black, is there a way I can make it so the player collides with anything the color black? That would be an incredible help.
I would suggest taking the time to learn how to use tile maps. Using tiles should help you accomplish what you want and there's already a bunch of tutorials on this, a few of them listed below.
Tile maps on the libGDX wiki
A tutorial on tile maps from gamesfromscratch.com
A YouTube tutorial on tile maps, which also covers collision detection
The tutorials I link may not apply exactly to your case, but they should hopefully point you in the right direction.
AS3 - Detect WHERE a collision occurred and ROTATE everything AFTER the collision point of the object by 90 degrees
DISCLAIMER
The following explanation probably makes no sense, so have a look at http://raphaelhennessy.com/misc/Explanation.png for more information
Essentially, I'm making a game where a lazer shines onto the screen and you have a mirror somewhere on the screen you can drag around. There is also a globe somewhere on the screen. The aim of the game is to direct the light, using the mirror, into the globe. Then, an animation plays of the globe filling with light and you progress to the next level.
After time, the levels get somewhat harder and new obstacles and challenges are introduced.
My problem is this; I got the lazer, mirror & globe all on the stage working fine except that I can't figure out how to programmatically make the lazer 'bounce' off the mirror.
Thanks in advance,
-Raph
I figured out how to do this. If you are interested you can find the code at raphaelhennessy.com/misc/LightStage.zip
I'm making a game similar to 'Run' (http://www.albinoblacksheep.com/games/run) but I can't quite figure out the floor part. I'm not wanting the sides and a ceiling like in 'Run', just the main floor.
I'm new to Flash game development (AS3) but I know the basics. I realise the character isn't moving and is just turning (the level itself moves). How do a make a continuous floor, do I have to make a very long .fla file, or do I have to do this with code?
All ideas and help appreciated, Thanks. =)
You should use Tiles. Basically, a tile game consists of a lot of squared tiles, which are inserted when appear in screen and removed when goes out.
In your case, maybe you could use a big tile, with screen's size.
You can visualize a good example here, also a very good resource for gamedev on Flash.
You need to generate sprites of the edge of the screen and either recycle them when their x < some value or dispose and create new ones.
I think you can just use Bitmap.draw() to draw different pixels on a Bitmap that you've applied a 3D transformation to. You can see the basic concept illustrated here.
I want to create a game where you shoot a rocket into the ground (Sand) and it blows, and moves the sand to the sides...
Is it possible in Box2D? breakable little objects?
It's almost pixel perfect collusion detection.
Thanks!
Yes it's possible, but beware your performance is going to be pretty weak. See the following articles (sorry guys, I normally like to paste in code instead of just link but there is are too much of it).
http://www.emanueleferonato.com/2012/01/17/create-real-explosions-with-box2d-adding-textures/
http://www.emanueleferonato.com/2012/01/05/create-real-explosions-with-box2d-exploding-objects-and-setting-the-center-of-explosion-with-mouse-click/
http://www.emanueleferonato.com/2011/12/08/create-real-explosions-with-box2d/
As far as dirt flying out when the ground breaks, the dirt doesn't have to be physical, you can just fake that with some particle effects. (Lots of tutorials on those things here)
In box2d it's not possible to break an object other than to remove the old one and create many new objects. If you need almost pixel perfect collision detection you'd need lots of objects. A 100x100 square contains 10 000 pixels.
A year ago I created a physical simulation involving many small particle-like objects using box2d. You can find the video here. The number of objects you see there is close to maximum Alchemy version of box2d could handle. AS3 version failed with much less.
You should google how it was done in old-school games like Scorched Earth for example. Or it might be possible to "cut" sand particles in area of effect of your missile from box2d shape, create many small particles, simulate them and join back to main terrain shape. But it sound very complicated.
I'm trying to create a multi-level dungeon adventure in Flash CS4. The layout is an instance created of a symbol called Level, within the symbol are multiple wall subsymbols (wall), instances of Wall. There is a collision routine to stop the player walking through the walls, called from Wall.As.
Level is drawn about the centre point (0,0).
When I create an instance on the stage of Level (level), the collision tester is using the xy coordinates for the walls drawn about 0,0, not the "real" xy where it's appearing on the stage.
So what I need to know, is how to "update" the xy for each wall subsymbol with the live stage information, overriding the XYs drawn in the parent. It has to be updated unfortunately (I can't keep it static), as the levels are big so have to scroll.
Thanks for your advice.
With all due respect forget your approach, you're reinventing the wheel for nothing and probably to end up getting worse performance. What you need is pixel-perfect collision detection and probably including basic physics so already we're talking a huge amount of work. If you want to build levels in a design way for a game, use this, it'll blow your mind how awesome/easy/cool this is:
http://www.gotoandlearn.com/play.php?id=135
Its always a guess when trying to answer questions like this, as there are a lot of unknowns. That being said, in programming, there are always more than a few ways to solve a problem. Examine your collision detection routine - if you worked with hitTestPoint, and the point that was being tested (mouseX,Y or your main actor) with localToGlobal, you likely wouldn't need to test for the x,y variables of your collision objects. Read up on those two subjects and this question might be rendered moot.
At any rate, you could update relative coordinates in your Wall.as instance by leveraging globlaToLocal:
public function get curLoc():Point
{
return globalToLocal(new Point(this.x, this.y));
}
and retrieve them from your parent class as a point you can then test against:
trace(_wall.curLoc);
Hope that helps
I suppose you could accomplish what you're trying to do by manipulating the transform property of the wall symbols, but honestly I would concur with Ascension Systems and just abandon your collision testing routine for something different.
You may not need to go all out with a physics engine for your game, in which case just use hitTestObject to do the collision detection.